What is Cosmos DB?

• It's a globally distributed multi-model database service. It provides APIs for SQL, MongoDB, Cassandra, Tables, or Gremlin so you can access your data. There's a free tier now, which was made available in March 2020.
• Azure Cosmos DB free tier is now available | Azure updates | Microsoft Azure

Why use Cosmos DB?

• Key benefits
  • Global distribution: You can add or remove any of the Azure regions to your Cosmos account at any time.
  • Provides 99.999% high availability for reads and writes.
  • The database engine is fully schema-agnostic.
  • A bunch more

Why use Functions with Cosmos?

• You can create event-driven serverless apps with low-latency access to data.
• Keep in mind that currently, Azure Functions trigger, input bindings, and output bindings for Cosmos DB are supported for use with the SQL API only. For all other Azure Cosmos DB APIs, you should access the database from your function by using the static client for your API.
• Serverless database computing with Azure Cosmos DB and Azure Functions

Bindings

• https://docs.microsoft.com/en-us/azure/azure-functions/functions-bindings-cosmosdb-v2

In this video I provide an overview of the trigger, input and output bindings for Cosmos DB and Azure Functions.

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